Australia captain Isaah Yeo says his side has not played to its full potential in the Ashes series, despite convincing wins in the first two Tests against England.

The Kangaroos triumphed 26-6 in the first Test at Wembley , before clinching a series victory with a 14-4 defeat of England at Everton Stadium last Sunday AEDT .

The final Test will be played at a sold-out Headingley in Leeds on Sunday morning AEDT.

Yeo said the Kangaroos were determined to produce a "full 80-minute performance" as they chased a series clean sweep.

"We just haven't done that yet, but it makes for a wonderful opportunity," he said.

"England will be all out to make sure it's not a 3-0 whitewash and we're trying to make sure it is.

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